When the debugger can not solve your problem best you should remove the existing build or go to restore the original installation, and you will probably have to install clean. after doing one of the suggested ones In my case you can download the build without any problems.

this was a helpful trick for me until the build 17017.1000 below is my latest casefirst of all I had been notified that build 17017.1000 is ready to install please restart I went throw the process many times but without success win starts with the old build so I decided to remove all hdds and kept the m.2 950 Samsung pro connected cause it is the OS drive the update was successful but now if I add any of my old Hdds witch I use before in my build windows won't boot pleas help

the "Windows 10 Insider Preview 17017.1000 (rs_prerelease)" appears to update "ok" ("installed @100%) but upon re-booting my PC there is an error (BSOD) which apparently prevents a successful install...then my PC re-boots again (automatically) without installing the update and afterwards re-downloads this OS update AGAIN !